[content] Add support for Non nestable idle tasks the the RendererScheduler

content/renderer/scheduler/single_thread_idle_task_runner.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/scheduler/single_thread_idle_task_runner.h"
 
 #include "base/location.h"
 #include "base/trace_event/trace_event.h"
 
 namespace content {
@@ skipping 19 matching lines @@
 }
 
 void SingleThreadIdleTaskRunner::PostIdleTask(
     const tracked_objects::Location& from_here,
     const IdleTask& idle_task) {
   idle_priority_task_runner_->PostTask(
       from_here,
       base::Bind(&SingleThreadIdleTaskRunner::RunTask, this, idle_task));
 }
 
+void SingleThreadIdleTaskRunner::PostNonNestableIdleTask(
+    const tracked_objects::Location& from_here,
+    const IdleTask& idle_task) {
+  idle_priority_task_runner_->PostNonNestableTask(
+      from_here,
+      base::Bind(&SingleThreadIdleTaskRunner::RunTask, this, idle_task));
+}
+
 void SingleThreadIdleTaskRunner::PostIdleTaskAfterWakeup(
     const tracked_objects::Location& from_here,
     const IdleTask& idle_task) {
   after_wakeup_task_runner_->PostTask(
       FROM_HERE, base::Bind(&SingleThreadIdleTaskRunner::PostIdleTask, this,
                             from_here, idle_task));
 }
 
 void SingleThreadIdleTaskRunner::RunTask(IdleTask idle_task) {
   base::TimeTicks deadline;
   deadline_supplier_.Run(&deadline);
   TRACE_EVENT1("renderer.scheduler",
                "SingleThreadIdleTaskRunner::RunTask", "allotted_time_ms",
                (deadline - base::TimeTicks::Now()).InMillisecondsF());
   idle_task.Run(deadline);
   bool is_tracing;
   TRACE_EVENT_CATEGORY_GROUP_ENABLED("renderer.scheduler", &is_tracing);
   if (is_tracing && base::TimeTicks::Now() > deadline) {
     TRACE_EVENT_INSTANT0("renderer.scheduler",
                          "SingleThreadIdleTaskRunner::DidOverrunDeadline",
                          TRACE_EVENT_SCOPE_THREAD);
   }
 }
 
 }  // namespace content